Gil Fronsdal wrote an excellent article on impermanence and its importance in Buddhist practice. This includes a discussion of the Buddha’s approach to working with the suffering that can result from clinging in the midst of change and uncertainty. You can find that article here: Impermanence
The following piece by Connie Anderson looks at the ways in which we can make impermanence a practice, not just a theoretical belief. You can find her post here: Blindsided by Impermanence